/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2021 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "usart.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "oled.h"
#include "modbus.h"
#include "string.h"
#include "stdio.h"
/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */
uint32_t pulse_all_count=0;
uint32_t pulse_count = 0;
uint32_t pulse_number_per_second = 0;
uint32_t pulse_ms_count=0;
uint32_t pulse_speed;
uint32_t pulse_speed_buffer[10];

uint32_t second=0;

uint8_t update_display__flag = 0;
/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
int flag_1s;
int flag_100ms;
/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
    uint8_t dis_buf[17];
    int i=0;
    uint32_t temp = 0;
    
    HAL_Init();

    SystemClock_Config();

    MX_GPIO_Init();

    OLED_Init();

    while (1)
    {
        if(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_4)==GPIO_PIN_RESET)
        {
            second = 0;
            memset(pulse_speed_buffer,0,sizeof(pulse_speed_buffer));
            pulse_speed = 0;
            pulse_ms_count = 0;
            pulse_number_per_second = 0;
            pulse_all_count = 0;
        }  
                
        if(flag_1s)
        {
            flag_1s = 0;            
            second++;

            update_display__flag = 1;
            
            if((second%60)==0)
            {
                pulse_number_per_second = pulse_count;
                pulse_count = 0;
            }            
        }
        
        if(update_display__flag)
        {
            update_display__flag = 0;
            
            temp = 0;
            for(i=0;i<5;i++)
            {
                temp += pulse_speed_buffer[i];
            }
            
            temp /= 5;
            
            memset(dis_buf,0,sizeof(dis_buf));
            sprintf((char *)dis_buf,"%3d / %3d / %3d",pulse_number_per_second, temp, pulse_speed);
            OLED_ShowString(0,0,dis_buf);
            
            memset(dis_buf,0,sizeof(dis_buf));
            sprintf((char *)dis_buf,"Time[%4d:%02d]",second/60,second%60);            
            OLED_ShowString(0,4,dis_buf);
            
            memset(dis_buf,0,sizeof(dis_buf));
            sprintf((char *)dis_buf,"Count[%d]",pulse_all_count);            
            OLED_ShowString(0,6,dis_buf);
        }
        
        if(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_9))
        {
            HAL_GPIO_WritePin(GPIOC,GPIO_PIN_13,GPIO_PIN_SET);
        }        
        else
        {
            HAL_GPIO_WritePin(GPIOC,GPIO_PIN_13,GPIO_PIN_RESET);
        }                        
    }
}

void main_systick_callback(void)
{
    static uint32_t count=0;
    count++;
    
    if(count>=1000)
    {
        count = 0;
        flag_1s = 1;
    }
    
    if(count%100==0)
    {
        flag_100ms = 1;
    }
    
    if(pulse_ms_count < 5000)
    {
        pulse_ms_count++;
    }
}

void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
    int i;
    
    if(GPIO_Pin == GPIO_PIN_9)
    {
        if(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_9))
        {
            pulse_count++;
            pulse_all_count++;
            
            if(pulse_ms_count>0)
            {
                if(pulse_ms_count<5000)
                {
                    pulse_speed = (60 * 1000) / pulse_ms_count;
                }
                else
                {
                    pulse_speed = 0;
                    memset(pulse_speed_buffer,0,sizeof(pulse_speed_buffer));
                }
                
                pulse_ms_count = 0;
                
                for(i=9;i>0;i--)
                {
                    pulse_speed_buffer[i] = pulse_speed_buffer[i-1];
                }
                pulse_speed_buffer[0] = pulse_speed;
            }
            
            update_display__flag = 1;
        }   
    }
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI_DIV2;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL12;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
  {
    Error_Handler();
  }
}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  __disable_irq();
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
